The FR-1.2 is designed to remove 5-, 6-, 7-, 8-, and 9-speed freewheels made by Shimano, Sun Race, DNP, Sachs, etc. Thin wall construction allows the tool to fit the freewheel’s 12 splines without removal of the hub cones and locknuts. 1” base fits wrench or bench vise. Made from heat-treated alloy steel.